当前位置: X-MOL 学术Russ. J. Mar. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The Size–Age Structure, Growth, and Maturation of the Spotted Catfish Arius maculatus (Thunberg, 1792) (Siluriformes: Ariidae) from the Mekong Delta, Vietnam
Russian Journal of Marine Biology ( IF 0.5 ) Pub Date : 2021-04-05 , DOI: 10.1134/s1063074021010053
D. N. Kutsyn , E. R. Ablyazov , Ba Hai Truong , Nguyen Dinh Cu

Abstract

The size–age structure, growth, and maturation of the spotted catfish Arius maculatus (Thunberg, 1792) from the Hau River estuary, Mekong Delta, Vietnam, were studied for the first time. A total of 460 fish specimens collected from January to March 2019 were examined. The annuli on the otoliths were visualized; their formation may be related with the alternation of the dry and rainy seasons. The male to female ratio in the catches was 1 : 1.81. The proportion of males decreased in the older age groups. The maximum total body length of the females was 21.9 cm; for the males, it was 23.7 cm. The maximum recorded age of females in catches was 7+; for males it was 8+. No inter-gender differences in growth were detected. The parameters of the von Bertalanffy equation for both sexes according to empirical data were as follows: L = 28.3 cm; k = 0.15/yr; t0 = –1.03 yr; growth performance index, φ = 2.08. The coefficients of the relationship between mass and length were as follows: a = 0.0054; b = 3.22. Maturation began at a body length of 13 cm at an age of 3 yr and ended at a body length of 18 cm at an age of 6 yr; 50% of the individuals became mature at a body length of 15 cm at an age of 4 yr. No inter-gender differences in the timing of maturation were found. A. maculatus from the Mekong Delta is characterized by a low growth rate compared to other populations, which may be associated with the labile habitat conditions in the estuary zone.



中文翻译:

越南湄公河三角洲斑Cat鱼(Arius maculatus)的大小,年龄结构,生长和成熟度(Thunberg,1792年)(Siluriformes:Ariidae)

摘要

cat鱼(Arius maculatus)的大小-年龄结构,生长和成熟首次研究了越南湄公河三角洲Hau河口(Thunberg,1792年)。从2019年1月至2019年3月,共检查了460个鱼标本。耳石上的瓣环可视化;它们的形成可能与旱季和雨季的交替有关。渔获物中的男女比例为1:1:1.81。年龄较大的人群中男性比例下降。雌性的最大总长度为21.9厘米;对于男性,则为23.7厘米。渔获物中女性的最大记录年龄为7岁以上;男性为8岁以上。未检测到性别间的增长差异。所述贝塔朗菲方程男女根据经验数据的参数如下:大号 =28.3厘米; k = 0.15 /年;t 0 = –1.03年;生长绩效指数,φ= 2.08。质量和长度之间的关系的系数如下:a= 0.0054;和a= 0.0054。b = 3.22。在3岁时开始于体长13厘米,在6岁时结束于体长18厘米。50%的人在4岁时的身长为15厘米时已经成熟。在成熟时间上未发现性别间差异。与其他种群相比,湄公河三角洲的黄斑曲霉的特征在于生长速率低,这可能与河口区的不稳定栖息地条件有关。

更新日期:2021-04-06
down
wechat
bug